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Poster: Administrator, Curator, or Stafftracey pooh Date: Jan 13, 2006 7:14am
Forum: movies Subject: Re: why are thumbnails not created sometimes?

ok, so i'm *pretty* sure i've seen successful derives
of this kind of compressed movie (but not 100%)...


anyway, both "derive.php" tasks show the same error
in mplayer:
...
Building audio filter chain for 44100Hz/2ch/s16le -> 44100Hz/2ch/s16le...
Starting playback...
mplayer: h264.c:2306: mc_dir_part: Assertion `pic->data[0]' failed.

so it doesn't seem to understand the specific kind of
h264 encoding you have for this file.

you can add files (eg: your thumbnails) to your item
by doing the:
"Edit item"
"item manager"
"checkout .." button
and then FTP them in.
next hit the "Edit item" page again and describe the formats
See another movie on our site for how to name the files and thumbnail subdir, etc....

good luck!
--tracey

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Poster: Administrator, Curator, or Staffindiworks Date: Jan 13, 2006 7:58am
Forum: movies Subject: Re: why are thumbnails not created sometimes?

yes, thanks - i actually already managed to do that...

i was just mentioning this here, since i plan to upload all my future works as mpeg4/h.264 encoded files and the d.i.y. thumbnail creation can be a bit time consuming.

since you don't rule out that the deriver does not understand the h.264 encoding of my movie, here is what i did:

i exported from final cut (using the then latest quicktime 7.0.3) and encoded the .mp4 with an image size of 720 x 576, 25fps, 896 kbits/sec for picture - best quality/multi-pass - and 128 kbits/sec for sound using the aac codec. quicktime also said that "the file conforms to mp4 file format specification". so this looked o.k. to me, but obviously i can't rule out some strange or unknown quicktime related bug.

if there are any limitations to what the deriver can handle (kbits/sec etc.) then it would be good to know... (maybe interesting in that context: the actual file size of "vincent" is 332 mb, but the movie's site now says it's 348 mb.)

thanks,

valentin (indiworks)